<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-button
          @click="toUploadXls">点击下载模版</el-button>
      </el-form-item>

      <el-form-item label="选择Excel">
        <el-upload
          ref="upload"
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="BASE_API+'/eduservice/subject/addSubject'"
          name="file"
          accept="application/vnd.ms-excel">
          <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
          <el-button
            :loading="loading"
            style="margin-left: 10px;"
            size="small"
            type="success"
            @click="submitUpload">{{fileUploadBtnText}}</el-button>
        </el-upload>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
  export default{
    data(){
      return {
         BASE_API: process.env.BASE_API, // 接口API地址
         OSS_PATH: process.env.OSS_PATH, // 阿里云OSS地址
         fileUploadBtnText: '上传到服务器', // 按钮文字
         importBtnDisabled: false, // 按钮是否禁用,
         loading: false
      }
    },
    created(){


    },
    methods:{
      //上传文件
      submitUpload(){
        this.fileUploadBtnText = '正在上传'
        this.importBtnDisabled = true
        this.loading = true
        this.$refs.upload.submit()
      },
      //上传成功
     fileUploadSuccess(response) {
         if (response.success === true) {
         this.fileUploadBtnText = '上传课程分类成功'
         this.loading = false
         this.$message({
             type: 'success',
             message: response.message
         })
         }
         //成功之后跳转课程分类列表
          this.$router.push({ path: '/subject/table' })
     },
      //上传失败
     fileUploadError(response) {
         this.fileUploadBtnText = '上传课程分类失败,可能是上传文件格式出错，请下载模板模仿'
         this.loading = false
         this.$message({
         type: 'error',
         message: '上传课程分类失败,可能是上传文件格式出错，请下载模板模仿'
         })
     },
     //下载课程添加模板
     toUploadXls(){
        window.location.href = "https://education-zyf.oss-cn-beijing.aliyuncs.com/Excel-xls/%E6%B7%BB%E5%8A%A0%E8%AF%BE%E7%A8%8B%E5%88%86%E7%B1%BB%E6%A8%A1%E6%9D%BF%E8%A1%A8.xls";
     }


    }
  }
</script>

<style>
</style>
